LukeZGD/ios-downgrade-dualboot.md

## ios-downgrade-dualboot.md

      
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              ios-downgrade-dualboot.md
            
          
    Downgrade and dualboot status of almost all iOS devices

UPDATED: 2025-07-01

Reddit mirror: https://www.reddit.com/r/iOSDowngrade/comments/j1x7iv/downgrade_and_dualboot_status_of_almost_all_ios/
GitHub Gist mirror: https://gist.github.com/LukeZGD/9d781f1b03a69fa46869384a9407a41a
As of updating this post, there is now a free downgrade tool that utilizes a SEP exploit released for A9-A10X devices, turdus merula: https://sep.lol/

Untethered with blobs guide: https://ios.cfw.guide/turdusmerula/
Tethered guide: https://ios.cfw.guide/turdusmerula-tethered/


Save SHSH blobs for signed iOS versions using TSS Saver or blobsaver
GitHub repo for futurerestore nightly: https://github.com/futurerestore/futurerestore
For Windows builds of futurerestore nightly, go to the Discord server linked in the readme
Almost all 32-bit downgrades can be done by Legacy iOS Kit: https://github.com/LukeZGD/Legacy-iOS-Kit
Delay OTA Guide (updating only): https://ios.cfw.guide/updating-blobless
Even if there are Windows builds/versions for some of these tools, iOS downgrades should be done on macOS or Linux only

A12 devices and newer


You cannot restore to any iOS versions other than signed ones. All SHSH blobs are currently useless.

A10(X) iPads


Devices that fall under here have iPadOS 17.x as the latest version. (18.x for iPad 7)
Use turdus medula for downgrades to any version (see guides above): https://sep.lol/

A11 devices


Devices that fall under here are the iPhone 8 and X.
See the SEP/BB Compatibility Chart. iOS 16 SEP/baseband is incompatible with iOS 15 and below.
These devices can be restored to iOS 16.6.x with SHSH blobs, you may use Legacy iOS Kit for this which utilizes the updated futurerestore nightly.
For downgrades to iOS 14.3-15 with blobs for iPhone 8 and X devices (For advanced users only), See "Guide for downgrading iOS 16+ checkm8 devices to iOS 14-15" linked here: https://gist.github.com/pixdoet/2b58cce317a3bc7158dfe10c53e3dd32

On the futurerestore part in Part 3, use Legacy iOS Kit to restore to iOS 14.3-15 with blobs. Then continue with the guide for activation


A9(X) and A10(X) devices, also iPad Air 2 and mini 4


Devices that fall under here have iOS 15.x as the latest version. (16.x for older A9(X) iPads)
These devices can be restored to iOS 14.x/15.x with SHSH blobs. A9(X) iPads can also be restored to iOS 16.6.x with SHSH blobs. you may use Legacy iOS Kit for this which utilizes the updated futurerestore nightly.
A9(X) and A10(X) devices only: It may be better to instead use turdus medula for downgrades to any version (see guides above): https://sep.lol/

A7 and A8 devices except iPad Air 2 and mini 4


Devices that fall under here have iOS 12.5.7 as the latest version.
You can downgrade to as low as 11.3 with futurerestore if you have SHSH blobs

You can downgrade with SHSH blobs using Legacy iOS Kit


turdus medula may add support for A8(X) devices in a future update

A7 devices (iPhone 5S, iPad Air 1, iPad mini 2)


A7 devices (except iPad4,6 and all iPad mini 3 models) can downgrade to 10.3.3 without existing blobs, using Legacy iOS Kit or LeetDown

Unfortunately checkm8 is unreliable on Linux, so using macOS may be the better option with gaster having better success rates there
iPwnder Lite for iOS can also be used to put device in pwned DFU, if you have another jailbroken iOS device


You can also downgrade to 10.2-10.3.2 if you have SHSH blobs

You can go as low as 10.1.x but Touch ID will not work for 5S
You can downgrade with SHSH blobs using Legacy iOS Kit


A5(X) and A6(X) devices


Devices that fall under here have the iOS 9.3.5, 9.3.6, 10.3.3, or 10.3.4 as their latest version.
You can downgrade and jailbreak any of these devices (except for iPhone 5C) to iOS 8.4.1 using Legacy iOS Kit without existing blobs

For iPhone 4S and iPad 2 (except iPad2,4) devices, iOS 6.1.3 is also an option


You can downgrade to any iOS version that you have SHSH blobs for using Legacy iOS Kit
You can also save on-board SHSH blobs with Legacy iOS Kit's "Save Onboard Blobs" option
If you have iOS 7 SHSH blobs, you can do untethered downgrades using Legacy iOS Kit (powdersn0w)
You can also dualboot to any version except 4.3.x using Coolbooter

It is recommended to downgrade Coolbooter to 1.5 to 1.4.1
For devices jailbroken on iOS 10, downgrade Coolbooter first then install "Coolbooter Fix for Socket" from my repo: https://lukezgd.github.io/repo


iPad 2 only: You can dualboot to iOS 4.3.x using FourThree-iPad2 or 4tify-iPad2

4tify-iPad2 is for macOS only


You can downgrade tethered without blobs using Legacy iOS Kit, n1ghtshade, or Deca5

Both n1ghtshade and Deca5 are for macOS only
Usage of Legacy iOS Kit is recommended since both n1ghtshade and Deca5 have jailbreak issues


iPhone 4


You can downgrade to iOS 6, 5, or 4 untethered using Legacy iOS Kit (powdersn0w)

Only iPhone3,1 (GSM) and iPhone3,3 (CDMA) are supported for untethered downgrades


You can also use Legacy iOS Kit to downgrade with saved SHSH blobs (see above)
You can also use Legacy iOS Kit to do tethered downgrades

Downgrading tethered by going to: Restore/Downgrade -> Other (Tethered)
Do a tethered boot by going to: Other Utilities -> Just Boot
Tethered downgrade IPSWs option is also available in Legacy iOS Kit, see below notes


You can dualboot to any version except 4.x using Coolbooter
You can dualboot to 4.x using 4tify (macOS only)

4tify for Linux (untested): https://github.com/LukeZGD/4tify-linux


iPod touch 4th gen


There are no untethered downgrade options without blobs, unfortunately.
iPod touch 4th gen can be tethered upgrade to iOS 7: https://lukezgd.github.io/ipodtouchhax/
You can do tethered downgrades without blobs using Legacy iOS Kit

Downgrading tethered by going to: Restore/Downgrade -> Other (Tethered)
Do a tethered boot by going to: Other Utilities -> Just Boot
There is also the option to use tethered downgrade IPSWs from these (Restore/Downgrade -> Other (Custom IPSW)):
https://www.reddit.com/r/LegacyJailbreak/comments/ji17zv/discussion_would_you_guys_be_interested_in/
https://github.com/lychitree/pr3lude
https://archives.legacyjailbreak.com


iPhone 3GS, iPad 1, iPod touch 2nd and 3rd gen


You can also use Legacy iOS Kit to do untethered downgrades to other iOS versions without blobs (or with blobs also)
iOS 4.1 is signed for the 3GS, touch 2nd gen and 3rd gen, use iTunes or Legacy iOS Kit to downgrade

Error 1015 will show up at the end of restore for iTunes. You can exit recovery mode using RecoveryModeTool


Tethered downgrade option is also available in Legacy iOS Kit, see above notes

For the iPod touch 3rd gen, see tethered custom IPSWs in pr3lude


For iPod touch 2nd gen (old bootrom model), there is no firmware signing for versions 3.0 and lower can be restored freely. 3.x IPSWs are available here: https://invoxiplaygames.uk/ipsw/ and https://archives.legacyjailbreak.com

iPhone 2G, 3G, and iPod touch 1st gen


There is no firmware signing for these and they can be restored to any iOS version
Legacy iOS Kit also supports these devices for restoring custom IPSWs as well as restoring to any other iOS version

Jailbreak support is for iOS 4.2.1, 4.1 and 3.1.3 for these devices
Lowest working version is 2.0, 1.x does not work
This makes use of changes from tihmstar's idevicerestore fork (iOS 1 and 2 support): https://github.com/tihmstar/idevicerestore


iPhone 3G devices can be easily downgraded to iOS 4.1 and 3.1.3 using Legacy iOS Kit, with the option to jailbreak and hacktivate
For iPhone 2G and touch 1, here are 3.1.3 custom IPSWs that may be useful: https://github.com/LukeZGD/Legacy-iOS-Kit-Keys/releases/tag/jailbreak
Most IPSWs for iPod touch 1st gen are available here: https://invoxiplaygames.uk/ipsw/ and https://archives.legacyjailbreak.com